kilometers per hour. so i'd make it 100 units long. and let's suppose i'm going into a headwind, and the wind is coming toward me at 20. well, i can go like this, see, make an arrow 20. when i combine these things, my ground speed's gonna be what? this, take away this, that's gonna be that much shorter, sort of like that, you know? and if you're going-- again, and this time, the wind is coming behind you, a tailwind. and you're going, again, 100 with respect to this still area. and then if you got say, a 20 coming behind you, those two things combine to be what? you're going faster. do you need vectors to explain this idea, that if the wind is behind you, you go faster, and if the wind is in front of you, you go slower? answer begins with the n. no, you don't be needing vectors. but i'll tell you where the vectors do come in handy. like, you got a crosswind, okay? let's suppose you're flying like this, and let's suppose the wind is a crosswind coming like this, just as fast as you're going. let's suppose you're going 100 kilometers per hour, and you're in a hurricane. and a hurricane is comin
